FM over Small Stream

Poor

Shelby County, Iowa · 078370701 · Structure no. 000000000303880

Built: 1960; 65 years old
Condition: Poor; inspected April 2023
Type: Slab; Concrete Continuous
Length: 130 ft; 3 main spans
Daily traffic: 240; 2022 count
Owner: County; County Highway Agency

About this bridge

FM over Small Stream is a concrete continuous slab carrying FM over Small Stream in Shelby County, Iowa. It was built in 1960, so it is 65 years old, older than the Iowa average of 45.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 240 vehicles a day, roughly 13% of them trucks, projected to reach 240 by 2043. The structure is 130 ft (39.6 m) long and 26 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesFM

CrossesSmall Stream

Location078370701

RouteCounty Highway 0

CountyShelby County

StateIowa

Coordinates41.57758, -95.14366

Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

Component	Rating	Meaning
Deck	4 Poor	Advanced section loss, deterioration, spalling or scour.
Superstructure	4 Poor	Advanced section loss, deterioration, spalling or scour.
Substructure	5 Fair	All primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection	7 Good	Some minor problems.

Last inspectionApril 2023

Inspection intervalevery 24 months

Operating statusOpen, no restriction

ScourFoundations stable; scour above top of footing

Structural evaluation4: Meets minimum tolerable limits to be left in place as is

Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is

Waterway adequacy7: Better than present minimum criteria

Approach roadway alignment8: Equal to present desirable criteria

Operating rating43.2 US tons

Inventory rating26.1 US tons

Structure

Structure typeSlab

MaterialConcrete Continuous

DeckConcrete, cast-in-place

Main spans3

Design loadH 15

Structure length130 ft (39.6 m)

Longest span49 ft (14.9 m)

Deck width26 ft (8 m)

Roadway width24 ft (7.3 m)

Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic240 (2022)

Projected traffic240 by 2043

Trucks13%

Lanes on structure2

Traffic directionTwo-way traffic

CarriesHighway

CrossesWaterway

Detour if closed8.7 mi (14 km)

TollOn a free road

National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency

Maintained byCounty Highway Agency

Historic statusNot eligible for the National Register of Historic Places

Work proposedNone recorded

Estimated improvement cost—

NavigationNo navigation control on waterway

Frequently asked questions

When was FM over Small Stream built?

It was built in 1960, making it 65 years old in 2025.

What condition is FM over Small Stream in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2023.

How much traffic does FM over Small Stream carry?

About 240 vehicles per day (2022 count), of which roughly 13% are trucks.

How long is FM over Small Stream?

The structure is 130 ft (39.6 m) long with a longest span of 49 ft (14.9 m) and a deck 26 ft wide.

Who owns FM over Small Stream?

It is owned by the County Highway Agency.